16 GB!!! Thanks to Multimedia, who recommended Omni Technologies in a prior thread. The service was excellent, and the RAM arrived in no time. The best thing was the price! You can get a 16GB kit for $770;---I just needed 12 GB, seeing that I already had 4, so they charged me 600. It's so cool to see the Mac Pro taking note that all the risers are full! Seeing that I got this baby in May to run Logic Pro and Aperture and won't be needing the new and improved Mac Pro with the 20-40% performance increase, I thought it best to max out the RAM, particularly when the RAM is do darn cheap! Cheers and ciao!